"As above, so below" by Roman Hill

https://vimeo.com/400306124
https://www.behance.net/gallery/94353547/AS-ABOVE
https://motionographer.com/2020/03/25/and-now-for-something-soothing-as-above-by-roman-hill/

The video should be viewed as art, not science. From the creator, on post-production:

Afterwards, color-grading is essential in my work. A lot of times I will completely change colors to illustrate something precise, such as fire, gold or water.

The creator again, on which chemical reactions were used:

I like to keep the details of my recipes secret. I see it as a way of protecting the magic surrounding the images. I love seeing adults be kids again by trying to understand what they are seeing. I feel like revealing the trick would take part of the magic away.

Via kottke.org